Kibwe Johnson celebrates with fans after competing at the men's hammer throw finals round at the U.S. Olympic Track and Field Trials Thursday, June 21, 2012, in Beaverton, Ore. (AP Photo/Charlie Riedel)

Kibwe Johnson celebrates with fans after competing at the men's hammer throw finals round at the U.S. Olympic Track and Field Trials Thursday, June 21, 2012, in Beaverton, Ore. (AP Photo/Charlie Riedel)

Kibwe Johnson celebrates with fans after competing at the men's hammer throw finals round at the U.S. Olympic Track and Field Trials Thursday, June 21, 2012, in Beaverton, Ore. (AP Photo/Charlie Riedel)

Kibwe Johnson celebrates with fans after competing at the men's hammer throw finals round at the U.S. Olympic Track and Field Trials Thursday, June 21, 2012, in Beaverton, Ore. (AP Photo/Charlie Riedel)

Amber Campbell, left to right, Amanda Bingson and Jessica Crosby celebrate after competing at the women's hammer throw finals round at the U.S. Olympic Track and Field Trials Thursday, June 21, 2012, in Beaverton, Ore. (AP Photo/Charlie Riedel) less

Amber Campbell, left to right, Amanda Bingson and Jessica Crosby celebrate after competing at the women's hammer throw finals round at the U.S. Olympic Track and Field Trials Thursday, June 21, 2012, in ... more